JOB DATA:
CHILLER MODEL NO. YT _______________
CHILLER MODEL NO. YT _____________________
NO. OF UNITS ________________________
NO. OF UNITS ______________________________
TYPE OF STARTING ___________________
TYPE OF STARTING _________________________
Included by YORK for Field Installation (by others) are:
YES
NO
PER UNIT
One – Two Unit Sequence Control Kit, Part No. 466-61597T
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'
_____
Condenser Water Flow Switch
'
'
_____
________________________________________________________
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'
_____
________________________________________________________
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'
_____
PRODUCT DRAWING
YORK INTERNATIONAL CORPORATION
P.O. Box 1592, York, PA 17405
CONTRACTOR _______________________
PURCHASER ____________________________________________
ORDER NO. __________________________
JOB NAME _______________________________________________
YORK CONTRACT NO. _________________
LOCATION _______________________________________________
YORK ORDER NO. ____________________
ENGINEER ______________________________________________
REFERENCE
DATE ________
APPROVAL
DATE ________
CONSTRUCTION
DATE ________
Supersedes: Nothing
Form 160.55-PW7 (899)
WIRING DIAGRAM
FIELD CONTROL MODIFICATIONS
MILLENNIUM™ MODEL YT CHILLERS (STYLE J)
Millennium chiller design allows for ease of interfac-
ing with Energy Management Systems (EMS). The
Graphic Control Center includes unit status contacts,
provisions for remote control inputs and provisions for
remote setpoint reset of leaving chilled liquid tempera-
ture and current limit for EMS interfacing. See Note 7.
Five sets of unit status contacts are factory furnished
through a field wiring terminal board in the Graphic Con-
trol Center. Each set of contacts are single pole, nor-
mally open, rated at 5 amperes resistive at 240VAC.
Chiller status contacts are provided for unit:
• Remote Mode Ready to Start – See Fig. 1.
• Cycling Shutdown – See Fig. 2.
• Safety Shutdown – See Fig. 3.
• Run (System Operating) – See Fig. 4.
• Anticipatory/Alarm – See Fig. 5.
Four sets of inputs are available to the EMS, allowing
for remote control of unit operation. Input device con-
tact rating shall be 5 milliamperes at 115VAC. Field wir-
ing terminal board (TB4) in the Graphic Control Center
permits connection for the following operation:
• Remote Stop Contacts – See Fig. 6.
• Remote Start Contacts – See Fig. 6.
• Remote/Local Cycling Devices – See Fig. 7.
• Multi-unit sequence – See Fig. 8.
The chiller should not be cycled by the Energy Manage-
ment System because the large motor used to drive the
centrifugal compressor is limited to one start per 30 min-
utes. Instead, it is possible to limit the compressor motor
amp draw indirectly or directly by the following meth-
ods:
1. Application of Sequence Control Kit, so only one
unit is running, when a single unit can carry the
cooling load – See Fig. 10.
2. When multiple unit installations are controlled by
an EMS, remote start and stop contacts are avail-
able to start and stop each chiller per Fig. 6. Con-
tact rating shall be 5 milliamperes at 115 volts A.C.
ENERGY MANAGEMENT SYSTEMS
